fs/zfs/arc.c

1356 uint64_t l2arc_headroom = L2ARC_HEADROOM;	/* number of dev writes */
1369     &l2arc_headroom, 0, "number of dev writes");
1509 	l2arc_dev_t *dev = hdr->b_l2hdr.b_dev;
1512 	ASSERT(MUTEX_HELD(&dev->l2ad_mtx));
1515 		trim_map_free(dev->l2ad_vdev, hdr->b_l2hdr.b_daddr,
3307 	l2arc_dev_t *dev = hdr->b_l2hdr.b_dev;
3370 	mutex_enter(&dev->l2ad_mtx);
3378 	list_insert_after(&dev->l2ad_buflist, hdr, nhdr);
3379 	list_remove(&dev->l2ad_buflist, hdr);
3381 	mutex_exit(&dev->l2ad_mtx);
3391 	(void) refcount_remove_many(&dev->l2ad_alloc, arc_hdr_size(hdr), hdr);
3392 	(void) refcount_add_many(&dev->l2ad_alloc, arc_hdr_size(nhdr), nhdr);
3459 	l2arc_dev_t *dev = l2hdr->b_dev;
3462 	ASSERT(MUTEX_HELD(&dev->l2ad_mtx));
3465 	list_remove(&dev->l2ad_buflist, hdr);
3470 	vdev_space_update(dev->l2ad_vdev, -psize, 0, 0);
3472 	(void) refcount_remove_many(&dev->l2ad_alloc, psize, hdr);
3492 		l2arc_dev_t *dev = hdr->b_l2hdr.b_dev;
3493 		boolean_t buflist_held = MUTEX_HELD(&dev->l2ad_mtx);
3496 			mutex_enter(&dev->l2ad_mtx);
3513 			mutex_exit(&dev->l2ad_mtx);
7068  *	L2ARC dev |####|#|###|###|    |####| ... |
7302 	l2arc_dev_t *dev;
7310 	dev = cb->l2wcb_dev;
7311 	ASSERT3P(dev, !=, NULL);
7314 	buflist = &dev->l2ad_buflist;
7326 	mutex_enter(&dev->l2ad_mtx);
7353 			mutex_exit(&dev->l2ad_mtx);
7385 			(void) refcount_remove_many(&dev->l2ad_alloc,
7402 	mutex_exit(&dev->l2ad_mtx);
7404 	vdev_space_update(dev->l2ad_vdev, -bytes_dropped, 0, 0);
7567 l2arc_evict(l2arc_dev_t *dev, uint64_t distance, boolean_t all)
7574 	buflist = &dev->l2ad_buflist;
7576 	if (!all && dev->l2ad_first) {
7584 	if (dev->l2ad_hand >= (dev->l2ad_end - (2 * distance))) {
7589 		taddr = dev->l2ad_end;
7591 		taddr = dev->l2ad_hand + distance;
7593 	DTRACE_PROBE4(l2arc__evict, l2arc_dev_t *, dev, list_t *, buflist,
7597 	mutex_enter(&dev->l2ad_mtx);
7613 			mutex_exit(&dev->l2ad_mtx);
7629 		    hdr->b_l2hdr.b_daddr < dev->l2ad_hand)) {
7664 	mutex_exit(&dev->l2ad_mtx);
7679 l2arc_write_buffers(spa_t *spa, l2arc_dev_t *dev, uint64_t target_sz)
7689 	ASSERT3P(dev->l2ad_vdev, !=, NULL);
7770 			uint64_t asize = vdev_psize_to_asize(dev->l2ad_vdev,
7786 				mutex_enter(&dev->l2ad_mtx);
7787 				list_insert_head(&dev->l2ad_buflist, head);
7788 				mutex_exit(&dev->l2ad_mtx);
7792 				cb->l2wcb_dev = dev;
7799 			hdr->b_l2hdr.b_dev = dev;
7800 			hdr->b_l2hdr.b_daddr = dev->l2ad_hand;
7804 			mutex_enter(&dev->l2ad_mtx);
7805 			list_insert_head(&dev->l2ad_buflist, hdr);
7806 			mutex_exit(&dev->l2ad_mtx);
7808 			(void) refcount_add_many(&dev->l2ad_alloc, psize, hdr);
7838 			wzio = zio_write_phys(pio, dev->l2ad_vdev,
7845 			DTRACE_PROBE2(l2arc__write, vdev_t *, dev->l2ad_vdev,
7850 			dev->l2ad_hand += asize;
7876 	vdev_space_update(dev->l2ad_vdev, write_psize, 0, 0);
7882 	if (dev->l2ad_hand >= (dev->l2ad_end - target_sz)) {
7883 		dev->l2ad_hand = dev->l2ad_start;
7884 		dev->l2ad_first = B_FALSE;
7887 	dev->l2ad_writing = B_TRUE;
7889 	dev->l2ad_writing = B_FALSE;
7903 	l2arc_dev_t *dev;
7932 		 * doing so the next spa to feed from: dev->l2ad_spa.   This
7940 		if ((dev = l2arc_dev_get_next()) == NULL)
7943 		spa = dev->l2ad_spa;
7952 			spa_config_exit(spa, SCL_L2ARC, dev);
7961 			spa_config_exit(spa, SCL_L2ARC, dev);
7972 		l2arc_evict(dev, size, B_FALSE);
7977 		wrote = l2arc_write_buffers(spa, dev, size);
7983 		spa_config_exit(spa, SCL_L2ARC, dev);
7995 	l2arc_dev_t *dev;
7998 	for (dev = list_head(l2arc_dev_list); dev != NULL;
7999 	    dev = list_next(l2arc_dev_list, dev)) {
8000 		if (dev->l2ad_vdev == vd)
8005 	return (dev != NULL);
8059 	l2arc_dev_t *dev, *nextdev, *remdev = NULL;
8065 	for (dev = list_head(l2arc_dev_list); dev; dev = nextdev) {
8066 		nextdev = list_next(l2arc_dev_list, dev);
8067 		if (vd == dev->l2ad_vdev) {
8068 			remdev = dev;